Learn English – A word for ‘being secretly watched’ by someone.

You can use wish ill upon as in I would never wish ill upon anyone, but I hope never to see her again.

The following are informal

If the two parties are in the same place, then one of them can give the other the evil eye. A slightly cruder, less formal expression is giving someone a stink eye. The recipient of the stink eye doesn't necessarily need to know it - it can be given behind their back. If you can't actually see the other person, you'll have to settle for sending them bad vibes.

If you hope someone has bad luck, you could wish bad juju on someone.

If you have a superstition that some small action on your part could bring them bad luck, you can jinx them by performing that act. (West Coast AmE)

The job of the cartographer is drawing the map. The gathering of information is done by different sorts of specialists.

The physical layout is measured by a surveyor.

Information about plants is gathered by a biologist, a botanist, or a horticulturist; information about minerals and soils, by a geologist; about people, an anthropologist, sociologist, or ethnologist.

There is, so far as I know, no general word meaning, "person who collects information for eventual depiction on a map", although perhaps the word geographer might be useful in your context.